IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.2.228.0/25

network10.2.228.0/25

broadcast10.2.228.127

first host10.2.228.1

last host10.2.228.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.2.228.0/25

address00001010.00000010.11100100.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000010.11100100.00000000

broadcast00001010.00000010.11100100.01111111

green = network part, grey = host part

hex0x0a02e400

decimal167961600

reverse dns0.228.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:e400

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.228.0/32	10.2.228.0 – 10.2.228.0	10.2.228.0
2	10.2.228.1/32	10.2.228.1 – 10.2.228.1	10.2.228.1
3	10.2.228.2/32	10.2.228.2 – 10.2.228.2	10.2.228.2
4	10.2.228.3/32	10.2.228.3 – 10.2.228.3	10.2.228.3
5	10.2.228.4/32	10.2.228.4 – 10.2.228.4	10.2.228.4
6	10.2.228.5/32	10.2.228.5 – 10.2.228.5	10.2.228.5
7	10.2.228.6/32	10.2.228.6 – 10.2.228.6	10.2.228.6
8	10.2.228.7/32	10.2.228.7 – 10.2.228.7	10.2.228.7
9	10.2.228.8/32	10.2.228.8 – 10.2.228.8	10.2.228.8
10	10.2.228.9/32	10.2.228.9 – 10.2.228.9	10.2.228.9
11	10.2.228.10/32	10.2.228.10 – 10.2.228.10	10.2.228.10
12	10.2.228.11/32	10.2.228.11 – 10.2.228.11	10.2.228.11
13	10.2.228.12/32	10.2.228.12 – 10.2.228.12	10.2.228.12
14	10.2.228.13/32	10.2.228.13 – 10.2.228.13	10.2.228.13
15	10.2.228.14/32	10.2.228.14 – 10.2.228.14	10.2.228.14
16	10.2.228.15/32	10.2.228.15 – 10.2.228.15	10.2.228.15
17	10.2.228.16/32	10.2.228.16 – 10.2.228.16	10.2.228.16
18	10.2.228.17/32	10.2.228.17 – 10.2.228.17	10.2.228.17
19	10.2.228.18/32	10.2.228.18 – 10.2.228.18	10.2.228.18
20	10.2.228.19/32	10.2.228.19 – 10.2.228.19	10.2.228.19
21	10.2.228.20/32	10.2.228.20 – 10.2.228.20	10.2.228.20
22	10.2.228.21/32	10.2.228.21 – 10.2.228.21	10.2.228.21
23	10.2.228.22/32	10.2.228.22 – 10.2.228.22	10.2.228.22
24	10.2.228.23/32	10.2.228.23 – 10.2.228.23	10.2.228.23
25	10.2.228.24/32	10.2.228.24 – 10.2.228.24	10.2.228.24
26	10.2.228.25/32	10.2.228.25 – 10.2.228.25	10.2.228.25
27	10.2.228.26/32	10.2.228.26 – 10.2.228.26	10.2.228.26
28	10.2.228.27/32	10.2.228.27 – 10.2.228.27	10.2.228.27
29	10.2.228.28/32	10.2.228.28 – 10.2.228.28	10.2.228.28
30	10.2.228.29/32	10.2.228.29 – 10.2.228.29	10.2.228.29
31	10.2.228.30/32	10.2.228.30 – 10.2.228.30	10.2.228.30
32	10.2.228.31/32	10.2.228.31 – 10.2.228.31	10.2.228.31
33	10.2.228.32/32	10.2.228.32 – 10.2.228.32	10.2.228.32
34	10.2.228.33/32	10.2.228.33 – 10.2.228.33	10.2.228.33
35	10.2.228.34/32	10.2.228.34 – 10.2.228.34	10.2.228.34
36	10.2.228.35/32	10.2.228.35 – 10.2.228.35	10.2.228.35
37	10.2.228.36/32	10.2.228.36 – 10.2.228.36	10.2.228.36
38	10.2.228.37/32	10.2.228.37 – 10.2.228.37	10.2.228.37
39	10.2.228.38/32	10.2.228.38 – 10.2.228.38	10.2.228.38
40	10.2.228.39/32	10.2.228.39 – 10.2.228.39	10.2.228.39
41	10.2.228.40/32	10.2.228.40 – 10.2.228.40	10.2.228.40
42	10.2.228.41/32	10.2.228.41 – 10.2.228.41	10.2.228.41
43	10.2.228.42/32	10.2.228.42 – 10.2.228.42	10.2.228.42
44	10.2.228.43/32	10.2.228.43 – 10.2.228.43	10.2.228.43
45	10.2.228.44/32	10.2.228.44 – 10.2.228.44	10.2.228.44
46	10.2.228.45/32	10.2.228.45 – 10.2.228.45	10.2.228.45
47	10.2.228.46/32	10.2.228.46 – 10.2.228.46	10.2.228.46
48	10.2.228.47/32	10.2.228.47 – 10.2.228.47	10.2.228.47
49	10.2.228.48/32	10.2.228.48 – 10.2.228.48	10.2.228.48
50	10.2.228.49/32	10.2.228.49 – 10.2.228.49	10.2.228.49
51	10.2.228.50/32	10.2.228.50 – 10.2.228.50	10.2.228.50
52	10.2.228.51/32	10.2.228.51 – 10.2.228.51	10.2.228.51
53	10.2.228.52/32	10.2.228.52 – 10.2.228.52	10.2.228.52
54	10.2.228.53/32	10.2.228.53 – 10.2.228.53	10.2.228.53
55	10.2.228.54/32	10.2.228.54 – 10.2.228.54	10.2.228.54
56	10.2.228.55/32	10.2.228.55 – 10.2.228.55	10.2.228.55
57	10.2.228.56/32	10.2.228.56 – 10.2.228.56	10.2.228.56
58	10.2.228.57/32	10.2.228.57 – 10.2.228.57	10.2.228.57
59	10.2.228.58/32	10.2.228.58 – 10.2.228.58	10.2.228.58
60	10.2.228.59/32	10.2.228.59 – 10.2.228.59	10.2.228.59
61	10.2.228.60/32	10.2.228.60 – 10.2.228.60	10.2.228.60
62	10.2.228.61/32	10.2.228.61 – 10.2.228.61	10.2.228.61
63	10.2.228.62/32	10.2.228.62 – 10.2.228.62	10.2.228.62
64	10.2.228.63/32	10.2.228.63 – 10.2.228.63	10.2.228.63
65	10.2.228.64/32	10.2.228.64 – 10.2.228.64	10.2.228.64
66	10.2.228.65/32	10.2.228.65 – 10.2.228.65	10.2.228.65
67	10.2.228.66/32	10.2.228.66 – 10.2.228.66	10.2.228.66
68	10.2.228.67/32	10.2.228.67 – 10.2.228.67	10.2.228.67
69	10.2.228.68/32	10.2.228.68 – 10.2.228.68	10.2.228.68
70	10.2.228.69/32	10.2.228.69 – 10.2.228.69	10.2.228.69
71	10.2.228.70/32	10.2.228.70 – 10.2.228.70	10.2.228.70
72	10.2.228.71/32	10.2.228.71 – 10.2.228.71	10.2.228.71
73	10.2.228.72/32	10.2.228.72 – 10.2.228.72	10.2.228.72
74	10.2.228.73/32	10.2.228.73 – 10.2.228.73	10.2.228.73
75	10.2.228.74/32	10.2.228.74 – 10.2.228.74	10.2.228.74
76	10.2.228.75/32	10.2.228.75 – 10.2.228.75	10.2.228.75
77	10.2.228.76/32	10.2.228.76 – 10.2.228.76	10.2.228.76
78	10.2.228.77/32	10.2.228.77 – 10.2.228.77	10.2.228.77
79	10.2.228.78/32	10.2.228.78 – 10.2.228.78	10.2.228.78
80	10.2.228.79/32	10.2.228.79 – 10.2.228.79	10.2.228.79
81	10.2.228.80/32	10.2.228.80 – 10.2.228.80	10.2.228.80
82	10.2.228.81/32	10.2.228.81 – 10.2.228.81	10.2.228.81
83	10.2.228.82/32	10.2.228.82 – 10.2.228.82	10.2.228.82
84	10.2.228.83/32	10.2.228.83 – 10.2.228.83	10.2.228.83
85	10.2.228.84/32	10.2.228.84 – 10.2.228.84	10.2.228.84
86	10.2.228.85/32	10.2.228.85 – 10.2.228.85	10.2.228.85
87	10.2.228.86/32	10.2.228.86 – 10.2.228.86	10.2.228.86
88	10.2.228.87/32	10.2.228.87 – 10.2.228.87	10.2.228.87
89	10.2.228.88/32	10.2.228.88 – 10.2.228.88	10.2.228.88
90	10.2.228.89/32	10.2.228.89 – 10.2.228.89	10.2.228.89
91	10.2.228.90/32	10.2.228.90 – 10.2.228.90	10.2.228.90
92	10.2.228.91/32	10.2.228.91 – 10.2.228.91	10.2.228.91
93	10.2.228.92/32	10.2.228.92 – 10.2.228.92	10.2.228.92
94	10.2.228.93/32	10.2.228.93 – 10.2.228.93	10.2.228.93
95	10.2.228.94/32	10.2.228.94 – 10.2.228.94	10.2.228.94
96	10.2.228.95/32	10.2.228.95 – 10.2.228.95	10.2.228.95
97	10.2.228.96/32	10.2.228.96 – 10.2.228.96	10.2.228.96
98	10.2.228.97/32	10.2.228.97 – 10.2.228.97	10.2.228.97
99	10.2.228.98/32	10.2.228.98 – 10.2.228.98	10.2.228.98
100	10.2.228.99/32	10.2.228.99 – 10.2.228.99	10.2.228.99
101	10.2.228.100/32	10.2.228.100 – 10.2.228.100	10.2.228.100
102	10.2.228.101/32	10.2.228.101 – 10.2.228.101	10.2.228.101
103	10.2.228.102/32	10.2.228.102 – 10.2.228.102	10.2.228.102
104	10.2.228.103/32	10.2.228.103 – 10.2.228.103	10.2.228.103
105	10.2.228.104/32	10.2.228.104 – 10.2.228.104	10.2.228.104
106	10.2.228.105/32	10.2.228.105 – 10.2.228.105	10.2.228.105
107	10.2.228.106/32	10.2.228.106 – 10.2.228.106	10.2.228.106
108	10.2.228.107/32	10.2.228.107 – 10.2.228.107	10.2.228.107
109	10.2.228.108/32	10.2.228.108 – 10.2.228.108	10.2.228.108
110	10.2.228.109/32	10.2.228.109 – 10.2.228.109	10.2.228.109
111	10.2.228.110/32	10.2.228.110 – 10.2.228.110	10.2.228.110
112	10.2.228.111/32	10.2.228.111 – 10.2.228.111	10.2.228.111
113	10.2.228.112/32	10.2.228.112 – 10.2.228.112	10.2.228.112
114	10.2.228.113/32	10.2.228.113 – 10.2.228.113	10.2.228.113
115	10.2.228.114/32	10.2.228.114 – 10.2.228.114	10.2.228.114
116	10.2.228.115/32	10.2.228.115 – 10.2.228.115	10.2.228.115
117	10.2.228.116/32	10.2.228.116 – 10.2.228.116	10.2.228.116
118	10.2.228.117/32	10.2.228.117 – 10.2.228.117	10.2.228.117
119	10.2.228.118/32	10.2.228.118 – 10.2.228.118	10.2.228.118
120	10.2.228.119/32	10.2.228.119 – 10.2.228.119	10.2.228.119
121	10.2.228.120/32	10.2.228.120 – 10.2.228.120	10.2.228.120
122	10.2.228.121/32	10.2.228.121 – 10.2.228.121	10.2.228.121
123	10.2.228.122/32	10.2.228.122 – 10.2.228.122	10.2.228.122
124	10.2.228.123/32	10.2.228.123 – 10.2.228.123	10.2.228.123
125	10.2.228.124/32	10.2.228.124 – 10.2.228.124	10.2.228.124
126	10.2.228.125/32	10.2.228.125 – 10.2.228.125	10.2.228.125
127	10.2.228.126/32	10.2.228.126 – 10.2.228.126	10.2.228.126
128	10.2.228.127/32	10.2.228.127 – 10.2.228.127	10.2.228.127

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /25
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	-
/24	255.255.255.0	256	254	-
/25	255.255.255.128	128	126	1
/26	255.255.255.192	64	62	2 split →
/27	255.255.255.224	32	30	4 split →
/28	255.255.255.240	16	14	8 split →
/29	255.255.255.248	8	6	16 split →
/30	255.255.255.252	4	2	32 split →
/31	255.255.255.254	2	2	64 split →
/32	255.255.255.255	1	1	128 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →